In an alternate universe, heroic analogues of Lex Luthor and the Joker (called the Jester) are attempting to steal a device from the headquarters of the Crime Syndicate. The pair trip an alarm but manage to secure the "Quantum Trigger". The Jester sacrifices himself to allow Luthor to escape and kills J'edd J'arkus and Angelique (alternate versions of Martian Manhunter and Hawkgirl respectively) with a radioactive bomb. Luthor is confronted by the remaining Syndicate members - Ultraman, Superwoman, Power Ring, Johnny Quick and Owlman, but escapes to the Earth of the heroic Justice League by activating a dimensional travel device. Luthor locates a police station and is mistaken for the evil Luthor where he ends up strip-searched. The Justice League are summoned and Superman's x-ray vision confirms Luthor's reversed organs indicate that he is from a parallel Earth and that the evil Luthor is still incarcerated at Stryker's Island. The Justice League take the alternate Lex Luthor to their Watchtower, where the heroes learn of the Syndicate threat. As the Justice League debate the matter, Luthor hides the Quantum Trigger on the satellite. With the exception of Batman, who decides to stay as he believes the League is too busy with their own issues, the group - Superman, Wonder Woman, Green Lantern, Flash and Martian Manhunter - travel to Luthor's Earth.